44 static u64 rtc_read_lpsrt(struct snvs_rtc_data *data)  in rtc_read_lpsrt()  argument
48 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &msb);  in rtc_read_lpsrt()
49 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &lsb);  in rtc_read_lpsrt()
56 static u32 rtc_read_lp_counter(struct snvs_rtc_data *data)  in rtc_read_lp_counter()  argument
65 	read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
68 		read1 = rtc_read_lpsrt(data);  in rtc_read_lp_counter()
71 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter()
78 static int rtc_read_lp_counter_lsb(struct snvs_rtc_data *data, u32 *lsb)  in rtc_read_lp_counter_lsb()  argument
83 	regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
86 		regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);  in rtc_read_lp_counter_lsb()
89 		dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");  in rtc_read_lp_counter_lsb()
97 static int rtc_write_sync_lp(struct snvs_rtc_data *data)  in rtc_write_sync_lp()  argument
104 	ret = rtc_read_lp_counter_lsb(data, &count1);  in rtc_write_sync_lp()
110 		ret = rtc_read_lp_counter_lsb(data, &count2);  in rtc_write_sync_lp()
116 		dev_err(&data->rtc->dev, "Timeout waiting for LPSRT Counter to change\n");  in rtc_write_sync_lp()
122 static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable)  in snvs_rtc_enable()  argument
127 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_SRTC_ENV,  in snvs_rtc_enable()
131 		regmap_read(data->regmap, data->offset + SNVS_LPCR, &lpcr);  in snvs_rtc_enable()
150 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_time()  local
151 	unsigned long time = rtc_read_lp_counter(data);  in snvs_rtc_read_time()
160 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_time()  local
167 	ret = snvs_rtc_enable(data, false);  in snvs_rtc_set_time()
172 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCLR, time << CNTR_TO_SECS_SH);  in snvs_rtc_set_time()
173 	regmap_write(data->regmap, data->offset + SNVS_LPSRTCMR, time >> (32 - CNTR_TO_SECS_SH));  in snvs_rtc_set_time()
176 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_set_time()
183 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_read_alarm()  local
186 	regmap_read(data->regmap, data->offset + SNVS_LPTAR, &lptar);  in snvs_rtc_read_alarm()
189 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_read_alarm()
197 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_alarm_irq_enable()  local
199 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR,  in snvs_rtc_alarm_irq_enable()
203 	return rtc_write_sync_lp(data);  in snvs_rtc_alarm_irq_enable()
208 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_set_alarm()  local
215 	regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0);  in snvs_rtc_set_alarm()
216 	ret = rtc_write_sync_lp(data);  in snvs_rtc_set_alarm()
219 	regmap_write(data->regmap, data->offset + SNVS_LPTAR, time);  in snvs_rtc_set_alarm()
222 	regmap_write(data->regmap, data->offset + SNVS_LPSR, SNVS_LPSR_LPTA);  in snvs_rtc_set_alarm()
238 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_irq_handler()  local
242 	regmap_read(data->regmap, data->offset + SNVS_LPSR, &lpsr);  in snvs_rtc_irq_handler()
250 		rtc_update_irq(data->rtc, 1, events);  in snvs_rtc_irq_handler()
254 	regmap_write(data->regmap, data->offset + SNVS_LPSR, lpsr);  in snvs_rtc_irq_handler()
267 	struct snvs_rtc_data *data;  in snvs_rtc_probe()  local
272 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);  in snvs_rtc_probe()
273 	if (!data)  in snvs_rtc_probe()
276 	data->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap");  in snvs_rtc_probe()
278 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
286 		data->regmap = devm_regmap_init_mmio(&pdev->dev, mmio, &snvs_rtc_config);  in snvs_rtc_probe()
288 		data->offset = SNVS_LPREGISTER_OFFSET;  in snvs_rtc_probe()
289 		of_property_read_u32(pdev->dev.of_node, "offset", &data->offset);  in snvs_rtc_probe()
292 	if (IS_ERR(data->regmap)) {  in snvs_rtc_probe()
297 	data->irq = platform_get_irq(pdev, 0);  in snvs_rtc_probe()
298 	if (data->irq < 0)  in snvs_rtc_probe()
299 		return data->irq;  in snvs_rtc_probe()
301 	data->clk = devm_clk_get(&pdev->dev, "snvs-rtc");  in snvs_rtc_probe()
302 	if (IS_ERR(data->clk)) {  in snvs_rtc_probe()
303 		data->clk = NULL;  in snvs_rtc_probe()
305 		ret = clk_prepare_enable(data->clk);  in snvs_rtc_probe()
313 	platform_set_drvdata(pdev, data);  in snvs_rtc_probe()
316 	regmap_write(data->regmap, data->offset + SNVS_LPPGDR, SNVS_LPPGDR_INIT);  in snvs_rtc_probe()
319 	regmap_write(data->regmap, data->offset + SNVS_LPSR, 0xffffffff);  in snvs_rtc_probe()
322 	ret = snvs_rtc_enable(data, true);  in snvs_rtc_probe()
330 	ret = devm_request_irq(&pdev->dev, data->irq, snvs_rtc_irq_handler,  in snvs_rtc_probe()
334 			data->irq, ret);  in snvs_rtc_probe()
338 	data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,  in snvs_rtc_probe()
340 	if (IS_ERR(data->rtc)) {  in snvs_rtc_probe()
341 		ret = PTR_ERR(data->rtc);  in snvs_rtc_probe()
349 	if (data->clk)  in snvs_rtc_probe()
350 		clk_disable_unprepare(data->clk);  in snvs_rtc_probe()
358 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_suspend()  local
361 		return enable_irq_wake(data->irq);  in snvs_rtc_suspend()
368 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_suspend_noirq()  local
370 	if (data->clk)  in snvs_rtc_suspend_noirq()
371 		clk_disable_unprepare(data->clk);  in snvs_rtc_suspend_noirq()
378 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_resume()  local
381 		return disable_irq_wake(data->irq);  in snvs_rtc_resume()
388 	struct snvs_rtc_data *data = dev_get_drvdata(dev);  in snvs_rtc_resume_noirq()  local
390 	if (data->clk)  in snvs_rtc_resume_noirq()
391 		return clk_prepare_enable(data->clk);  in snvs_rtc_resume_noirq()